Update style.css

Added warning class to style.css file

style.css

@@ -41,6 +41,14 @@ table {
 	width: 500px;
 }
 
+.warning {
+    display: inline-block;
+    background-color: beige;
+    border-radius: 20px;
+    text-wrap: pretty;
+    padding: 20px;
+}
+
 #topBtn {
 	display: none;
 	position: fixed;